DOD Hazmat Tech Course Review Questions

Terms in this set (92)

Identify 2 ways to determine the pressure of a railroad tank car
- read the pressure gauge attached to the sample line
-examine the specification markings
All of the resources below can be used to identify the capacity (by weight and/or volume) for facility tanks Except
AAR-600 markings
To determine the amount of lading remaining in a pressurized facility tank
use magnetic gauge
MATCH each term with is correct definition
Catalyst- speeds up or slows down a chemical reaction

Inhibitor- prevents a chemical from polymerizing

Oxidation potential- the ability of a substance to yield oxygen

Pyrophoric- a substance that can ignite if it comes in contact with air
MATCH each radioactive unit of measurement with its indication
Roentgen- amount of radiation a substance produces

Rad or rem- amount of radiation adsorbed by humans

Millicurie- amount of activity per unit of weight
MATCH each database with the MAIN type of information that can be found in that database
CHRIS- data for chemical spills into waterways

CAMEO/ALOHA- the way a spilled chemical can spread on atmospheric and weather conditions

RTECS- poisons effects of chemicals, including toxicology data, carcinogenic information, and reproductive effects
You have been called to a possible radiation incident at the Westin Hospital. The hospitals environmental staff as identified the source as being radium-236, an alpha particle emitter. As an emergency responder, the type of radiation survey meter you should you choose for this incident is a(n)
proportional counter
Identify 3 factors that may limit the effectiveness of an oxygen monitor
-changes in humidity
-extreme cold
-changes in elevation
Responders have been called to a liquid spill of methyl acetate, a hazardous material with the following properties:

UEL: 16% LEL: 3.1% IP 10.27eV

Identify 3 pieces of monitoring equipment that will help you determine the extent of the hazard control zones at this incident.
-oxygen meter
-photoionization detector
- combustible gas indicator
When monitoring for radiation using a Geiger- Muller counter, follow all of the procedures below EXCEPT
start with the detector shield closed to detect for beta and gamma radiation
Place the steps that should be carried out before using a direct reading instrument in the correct order
1. inspect the physical condition of the instrument
2. check the battery
3. check the alarm
4. allow the meter to return to background
5. calibrate the instrument
6. add attachments and then check for leaks
The initial entry team has verified that the overturned tank trunk at an incident is fully loaded with liquefied anhydrous ammonia. Monitor readings indicate the concentration to be 150ppm.

Identify all of the steps you will have to take to determine the extent of the hazards (physical, safety, and health) within the endangered area of the incident
- compare the actual readings to the exposure limits and IDLH listed in the resources
- find the exposure limits and IDLH of anhydrous ammonia in at least 3 resources.
The analysis of an incident should
continue throughout the incident and be revaluated as changes occur
The cable company has accidently severed a gas line while excavating in a large townhouse community. Your LERP requires evacuation for any positive readings for contaminants. Using the row numbers and the CGI reading for each, determine which rows of townhouses will have to be evacuated.
Row 2, 2.7% of LEL
Row 3, 40% of LEL
Row 4, 12% of LEL
Identify 3 factors that can affect the selection and use of an APR at a hazmat incident
-concentration of hazardous vapors in the atmosphere
-concentration of oxygen in the atmosphere
-whether the acid/gas filtration and purification devices to be used at this incident have passed their expiration date for use
When using loading/ unloading lines on an MC-306/DOT 406 cargo tank for a product transfer, be sure that
the unloading line is below the fuel level in the tank
Place the procedures for loss of communication into the proper sequence
1. use hand signals to alert other responders that communication has been lost
2.based on the situation, either exit the hot zone or continue operations
3. proceed to the warm zone and undergo decon
4.receive assistance removing your protective garments
5.restore the communication link, if possible prior to returning to the hot zone
Identify 4 factors that influence where to position a decon corridor
-location of paved roads
-location of environmentally sensitive areas'
-availability of fresh water
- wind direction
Identify 3 things that happen in the cold zone of a mass decon corridor
- people are given their belongings, as long as they are not irreversibly contaminated
- people are given warm, dry clothing
- injured people are transported to a medical facility
When grounding a damaged tank, place the clamp
low enough on the grounding rod so that foam, if used, will build up around the clamp
One difficulty commonly encountered when transferring product from MC- 306/ DOT 406 cargo tanks using the vapor recovery system is that the
rubber vent covers pop off, causing product spillage
To care for grounding and bonding cables used in product removal/ transfer operations from the cargo tanks
follow the manufacturer's cleaning and storage recommendations
The primary hazard you'll encounter when product from an MC-312/ DOT 412 cargo tank is
Corrosivity
When MC- 307/ DOT 407 cargo tanks must be unloaded, and there is too much damage to the loading/ unloading lines, remove/ transfer product by
removing valves above the liquid and then pumping through a grounded downspout
A large open floating roof tank containing approx 180,000 barrels of crude oil is burning. You're monitoring the operation to measure the effectiveness of the response. Water supply is not a problem, as a nearby river provides as much as needed. Four pumper units are engaged in cooling operations on adjoining storage tanks, and four more are on standby. your evaluation indicates that a heat wave has formed, and there is a probability of a boil over event. Your evaluation at this point is that it would be best to
coordinate with facility personnel and seek tech assistance and advice from storage tank fire fighting specialist
Research unit leader Chi is about to lead an incident debriefing. In the next 15 min she should
allow time for the IC to summarize hos/her thoughts and calculate the need for a critical incident stress debriefing
Responders have stabilized a toluene spill and have released control of the scene to an environmental contractor, thus ending the emergency phase of the incident. The next step is to
hold a debriefing
You have just written the critique record for an incident where several responders were badly burned. The next step is to
circulate the report to allow everyone in the response system to share the lessons learned
Responder N. Gard is certified to the operations level. Responder A. Salt is certified to the Tech level. Which responder(s) may apply a patch to a cargo tank leaking sulfuric acid
Responder A. Salt
Identify 2 ways to recognize a cryogenic cylinder
-small protective ring at the top
-made of steel
To determine the amount of lading remaining in an MC-306/ DOT 406
use a dipstick
The capacity of a non pressure cargo tank (MC-306/ DOT 406) is approx
2,000- 12,000 gallons
you respond to an incident involving an IM-101 portable tank container being transported by rail that has been involved in a derailment. Identify 2 methods that can be used to measure the amount of lading REMAINING in the tank
-using a thermal imaging device
-using a dipstick through the manway
Match each portable tank container to the material it may carry
Corrosive liquids- low pressure tank container

Propane- pressure tank container

Liquid nitrogen- cryogenic tank container
The type of tank that can be used to store vinyl chloride/ flammable gas is a
high pressure horizontal tank
Most pipeline are constructed of
Plastic or coated mill-wrapped steel
Some products are allowed to ____________ as they travel one after another through the same liquid pipeline
co-mingle
You arrive at an incident where a steel drum with a radioactive yellow iii label has been dented in its fall from its transported vehicle. Based on the info provided and your knowledge of the minimum radiation level on the package surface, this package
carries high level radiation up to 200 mrem/hr
When referring to the flammable range, if the air mixture is too lean for a substance to burn, the condition, is said to be
below the lower explosive limit
The physical state that is easiest to control during a hazmat is a
solid
The exposure limit that gives you the maximum concentration for four 15-min intervals in an 8 hr day is
TLV-STEL
An LD50 cited in a reference means
50% of the test animals died during experiments when exposed to the substance through methods other than inhalation
To determine the isolation and control points on a facility piping system, it would be best to have a
process diagram
It is important to have more than one reference manual on hand at an incident
because one manual usually doesn't cover every situation you'll encounter
You have responded to a suspected leak of ethylene oxide at an outpatient surgical center. The IP for ethylene oxide is 10.56eV. The PID used by your hazmat response team has a 10.6 eV bulb. Which of the following statements is correct
Your PID will ionize ethylene oxide
Identify 3 factors that may limit the effectiveness of an oxygen monitor
-change is humidity
-extreme cold
-changes in elevation
Responder Green is measuring an unknown atmosphere at a nuclear test facility. Recommend the proper order for monitoring a spill on the loading dock
1. Radiation
2. Flammability
3. Oxygen deficiency/ enrichment
4. toxicity
Place the steps that should be carried out before using a direct reading instruments in the correct order
1. inspect the physical condition of the instrument.
2. check the battery
3.check the alarm
4. allow the meter to return to background readings
5. calibrate the instrument
6. add attachments and then check for leaks
When monitoring to identify an unknown liquid
Monitor in order to classify the material according to its general hazard
The "outcome" of hazmat incidents are defined in terms of
fatalities, injuries, property, and environmental damage, and systems disruption
An estimate is a series of predictions that attempts to
provide an overall picture of potential outcomes of a hazmat incident
Match each of the 5 basic options that influence the outcome of a hazmat with its meaning
Magnitude- try to keep the incident as small as possible

Occurrence- prevent a future event(s) from occurring by influencing the current event

Timing- try to change when an event happens an/ or how long it lasts

Effects- try to reduce the size and or harmful effects of an event

Location- try to change where the next event occurs
Breaks in the CPC suit fabric created by contract with chemicals or physical abrasion are an example
degradation
All of the following are TRUE statements about CPC suit cooling systems EXCEPT
Suit cooling systems eliminate the need for medical monitoring
A sorbent is used with an air purifying respirator to
remove chemical contaminants from inhaled air
A typical plan of action is based on all of the following EXCEPT
The IC's knowledge of the hazmats behavior model
Due to their lightweight construction, you should never to upright a loaded
MC-306/ DOT 406
Not all MC-306/ DOT 406 cargo tanks are good candidates for the drilled hole method because
drilling steel generates sparks and heat
Identify 2 instances where a score on a pressure cargo tank may indicate the need for product off loading
-score cuts across weld into heat-affected metal
-scoring associated with a dent
The decontamination method that alters the chemical structure of a hazardous material is
chemical degradation
All of the following factors may contribute to a confined space being designated as " permit-requirement" EXCEPT
the space is less than 1 foot in diameter
Displacement using a non-flammable gas is one procedure for
inerting
Match each ICS position with its function
Assistant Safety Officer- Hazmat- Responsible for the safety of all personnel operating in the hot zone

Decontamination unit leader- determines the level of decon required

Entry unit leader- Supervises the entry team and makes recommendations about control activities

Information/ research- provides info on the hazards present and chemical compatibility of protective clothing and equipment
When preparing to decon, pay special attention to contaminants that can affect
PPE and monitoring equipment
When setting up a mass decon corridor, it should be located
upwind from the incident site
The object of bonding is to
keep objects at the same electrical potential, decreasing or eliminating any chance of a static spark
All of the following statements about containing drum leaks are TRUE EXCEPT
smearing epoxy over a forklift puncture can seal the hole
A valve/ plug assembly should be used to
replace a missing plug
Place the steps for using the internal valve to remove product from a "wheels- side" MC- 306/ DOT 406 cargo tank in the correct order
1. open the internal valve
2. drain product out of discharge lines
3. disconnect Victaulic coupling
4. pull out the valve
5. pump out the product through a grounded downspout
The primary hazard you'll encounter when removing product from an MC-312/ DOT 412 cargo tank is
Corrosivity
During entry operations you note that a process reactor has an abnormally high temp and pressure. At this time, you do not have the resources to correctly control either the high temp or high pressure. you should
immediately trigger emergency communications, such as air horns
You have just written the critique record for an incident where several responders were badly burned. The next step to
circulate the report to allow everyone in the response system to share the lessons learned
Include all of the following in the critique record EXCEPT
hot zone entry and exit logs
Identify all the people who should be present at an incident debriefing
- Hazmat response team
-IMS Officers
-IC
-Info offciers
The type of cargo tank truck that can be used to transport ammonium nitrate fertilizer I the
dry bulk cargo tank
The pressure relief device on an MC-331 is a
Pressure relief valve
Identify 2 TRUE statements about ton containers
- there are three fusible plugs on each end of the container
-valves can be used for liquid or vapor depending upon the containers position
Cryogenic liquid tank cars are easily recognized by their
lack of exposed fittings and lack of an enclosed manway
All of the following are characteristics of pressure tank cars EXCEPT
bottom unloading piping
The capacity of a low pressure vertical tank can range from
100 to 10,000 barrels
The organization that establishes the standards for constructing pipelines in the
American society of mechanical engineers (ASME)
Identify 3 protection factors associated wit radiation
-half-life
-inverse square law
-time, distance, and shielding
Identify 3 ways to monitor for choking agents
- M8 or M9 detection papers
-military detection kits
- electronic meters
Match each type of container damage with its description
Gouge- An indentation in the shell of a container that has been made by a sharp, chisel-like object and that cuts/ removes the metal or weld

Crack- A narrow split or break in the container metal

Dent- A round deformation of the container metal, usually caused by a blunt object

Score- An indentation in the shell of a container that has been made by a blunt object
All of the following factors should be considered when selecting the proper level of respiratory protection EXCEPT
the ability to refill SCBA cylinders
The difference between QT and NQT steel used for construction in cargo tanks, is that
NQT steel is more ductile than QT steel
Identify 3 things to consider when positioning the exhaust hose of a vacuum truck.
-terrain
-people
-ignition sources
Match the decon method with one of its advantages
Vacuuming- Hazmats are collected in containers for easy disposals

Neutralization- Resultant products are usually less harmful than the original contaminant

Adsorption- Many commercial products are readily available

Evaporation- Easy and requires limited personnel
The isolation method that requires you to insert a blind that completely covers the circumference of the pipe is called
blocking and blanking
To fix a leaking pressure relief valve gasket on a chlorine rail tank care, you could tighten the stud or nuts or
apply the hood assembly
An MC-306/ DOT 406 cargo tanker is found to be leaking gasoline from a number of small, regular punctures. The easiest method for stopping the leaks would be
plugging with small pine plugs
Identify 2 concerns to address when evaluating a pump for use in a removal/ transfer operation
-ignition source
-chemical compatibility
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